Bimmerfest - BMW Forums - View Single Post - 1995 E34 540i Engine knock, and rough idle
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Old 01-11-2013, 11:03 AM
Monsignor's Avatar
Monsignor Monsignor is offline
BMW CCA Memeber #445389
Location: Pineapple Under the Sea
Join Date: Oct 2009
Posts: 3,285
Mein Auto: Sig
sounds like it could be a loose spark plug. Get in there and torque them down. If you have a torque wrench the spec is
Spark Plug to Cylinder Head . . . . . 30 Nm (22 ft-lb) (Bentley, page 020-11)
If you need to replace them they are Bosche F7 L DCRs (Bentley, page 020-11)

Also make sure the coil boots are in good shape and not damaged

1995 525iA 250k mi
2003 350Z 90k mi FOR SALE
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Last edited by Monsignor; 01-11-2013 at 11:05 AM.
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